Catalog excerpts
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Open the catalog to page 2SED1335 Series Technical Manual
Open the catalog to page 3SED1335 Series Technical Manual
Open the catalog to page 4SED1335 Series Technical Manual
Open the catalog to page 5The SED1335 series is a controller IC that can display text and graphics on LCD panel. The SED1335 series can display layered text and graphics, scroll the display in any direction and partition the display into multiple screens. The SED1335 series stores text, character codes and bitmapped graphics data in external frame buffer memory. Display controller functions include transferring data from the controlling microprocessor to the buffer memory, reading memory data, converting data to display pixels and generating timing signals for the buffer memory, LCD panel. The SED1335 series has an...
Open the catalog to page 6BLOCK DIAGRAM Input/Output Register Display Address Controller Refresh Counter Layered Controller Microprocessor Interface Cursor Address Controller SED1335 Series Technical Manual
Open the catalog to page 7VD4 VD5 VD6 VD7 YSCL YD YDIS WF LP VSS XSCL XECL XD0 XD1 XD2 SED1335 Series Technical Manual
Open the catalog to page 8Output Output Output Input — VRAM write signal Memory control signal VRAM read signal Reset No connection 8080 family: Read signal 6800 family: Enable clock (E) 8080 family: Write signal 6800 family: R/W signal 8080 or 6800 family interface select 8080 or 6800 family interface select Oscillator connection Oscillator connection Chip select Data type select 2.7 to 5.5V supply Input Output Input Input Supply Output Output Output Supply Output Output Output Output Input/output D0 to D7 XD0 to XD3 XECL XSCL VSS LP WF YDIS YD YSCL VD0 to VD7 Data bus X-driver data X-driver enable chain clock...
Open the catalog to page 95.2. Pin Functions 5.2.1. Power supply Pin Name VDD VSS Function 2.7 to 5.5V supply. This may be the same supply as the controlling microprocessor. Ground Note: The peak supply current drawn by the SED1335 series may be up to ten times the average supply current. The power supply impedance must be kept as low as possible by ensuring that supply lines are sufficiently wide and by placing 0.47 µF decoupling capacitors that have good high-frequency response near the device’s supply pins. Function Crystal connection for internal oscillator (See section 13). This pin can be driven by an external...
Open the catalog to page 10Function 8080 family interface A0 Status flag read Display data and cursor address read Display data and parameter write Command write Status flag read Display data and cursor address read Display data and parameter write Command write When the 8080 family interface is selected, this signal acts as the active-LOW read strobe. The SED1335 series output buffers are enabled when this signal is active. When the 6800 family interface is selected, this signal acts as the active-HIGH enable clock. Data is read from or written to the SED1335 series when this clock goes HIGH. When the 8080 family...
Open the catalog to page 115.2.5. LCD drive signals In order to provide effective low-power drive for LCD matrixes, the SED1335 series can directly control both the X- and Y-drivers using an enable chain. Pin Name 4-bit X-driver (column drive) data outputs. Connect these outputs to the inputs of the X-driver chips. XSCL=clock XECL LP=latch The falling edge of XSCL latches the data on XD0 to XD3 into the input shift registers of the X-drivers. To conserve power, this clock halts between LP and the start of the following display line (See section 6.3.7). The falling edge of XECL triggers the enable chain cascade for...
Open the catalog to page 12Supply voltage Register data retention voltage Input leakage current Output leakage current Operating supply current Quiescent supply current Oscillator frequency External clock frequency Oscillator feedback resistance TTL HIGH-level input voltage LOW-level input voltage Measured at crystal, 47.5% duty cycle. See note 6. HIGH-level output voltage LOW-level output voltage CMOS HIGH-level input voltage LOW-level input voltage HIGH-level output voltage VIHC VILC VOHC LOW-level output voltage Open-drain LOW-level output voltage Schmitt-trigger Rising-edge threshold voltage Falling-edge...
Open the catalog to page 13VDD = 2.7 to 4.5 V, VSS = 0 V, Ta = –20 to 75˚C unless otherwise noted Rating Parameter Supply voltage Register data retention voltage Input leakage current Output leakage current Operating supply current Quiescent supply current Oscillator frequency External clock frequency Oscillator feedback resistance HIGH-level input voltage LOW-level input voltage HIGH-level output voltage LOW-level output voltage HIGH-level input voltage LOW-level input voltage HIGH-level output voltage LOW-level output voltage Open-drain LOW-level output voltage Schmitt-trigger Rising-edge threshold voltage...
Open the catalog to page 146.3. SED1335F Timing Diagrams 6.3.1. 8080 family interface timing AO, CS tAW8 Parameter Address hold time Address setup time System cycle time Strobe pulsewidth Data setup time Data hold time RD access time Output disable time Note: For memory control and system control commands: tCYC8 = 2tC + tCC + tCEA + 75 > tACV + 245 For all other commands: tCYC8 = 4tC + tCC + 30
Open the catalog to page 156.3.2. 6800 family interface timing E tCYC6 tAW6 Note: tCYC6 indicates the interval during which CS is LOW and E is HIGH. System cycle time Address setup time Address hold time Data setup time Data hold time Output disable time Access time Enable pulsewidth Note: For memory control and system control commands: tCYC6 = 2tC + tEW + tCEA + 75 > tACV + 245 For all other commands: tCYC6 = 4tC + tEW + 30
Open the catalog to page 166.3.3. Display memory read timing EXTΦ0 tC tW tAHC tRCH tASC tAHC tRCS Parameter Clock period VCE HIGH-level pulsewidth VCE LOW-level pulsewidth Read cycle time 3tC — 3t C — Address setup time to — tC – 100 — tC – 70 falling edge of VCE Address hold time from — 2tC – 40 — 2tC – 30 falling edge of VCE Read cycle setup time to tC – 45 — tC – 60 — falling edge of VCE Read cycle hold time — 0.5tC — 0.5tC from rising edge of VCE Address access time — 3tC – 100 — 3tC – 115 VCE access time — 2tC – 80 — 2tC – 90 Output data hold time 0 — 0 — VCE to data off time 0 — 0 —
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